diff --git a/src/spicelib/devices/bjt/bjtparam.c b/src/spicelib/devices/bjt/bjtparam.c
index 6649c96e1..a66e0a8c2 100644
--- a/src/spicelib/devices/bjt/bjtparam.c
+++ b/src/spicelib/devices/bjt/bjtparam.c
@@ -26,7 +26,7 @@ BJTparam(int param, IFvalue *value, GENinstance *instPtr, IFvalue *select)
 
     NG_IGNORE(select);
 
-    switch(param) {
+    switch (param) {
         case BJT_AREA:
             here->BJTarea = value->rValue;
             here->BJTareaGiven = TRUE;
@@ -66,7 +66,9 @@ BJTparam(int param, IFvalue *value, GENinstance *instPtr, IFvalue *select)
             here->BJTsenParmNo = value->iValue;
             break;
         case BJT_IC :
-            switch(value->v.numValue) {
+            /* FALLTHROUGH added to suppress GCC warning due to
+             * -Wimplicit-fallthrough flag */
+            switch (value->v.numValue) {
                 case 2:
                     here->BJTicVCE = *(value->v.vec.rVec+1);
                     here->BJTicVCEGiven = TRUE;
diff --git a/src/spicelib/devices/bsim1/b1par.c b/src/spicelib/devices/bsim1/b1par.c
index 7b6887d93..0d64b3bcc 100644
--- a/src/spicelib/devices/bsim1/b1par.c
+++ b/src/spicelib/devices/bsim1/b1par.c
@@ -21,7 +21,7 @@ B1param(int param, IFvalue *value, GENinstance *inst,
     
     NG_IGNORE(select);
 
-    switch(param) {
+    switch (param) {
         case BSIM1_W:
             here->B1w = value->rValue;
             here->B1wGiven = TRUE;
@@ -74,7 +74,9 @@ B1param(int param, IFvalue *value, GENinstance *inst,
             here->B1icVGSGiven = TRUE;
             break;
         case BSIM1_IC:
-            switch(value->v.numValue){
+            /* FALLTHROUGH added to suppress GCC warning due to
+             * -Wimplicit-fallthrough flag */
+            switch (value->v.numValue){
                 case 3:
                     here->B1icVBS = *(value->v.vec.rVec+2);
                     here->B1icVBSGiven = TRUE;
diff --git a/src/spicelib/devices/bsim2/b2par.c b/src/spicelib/devices/bsim2/b2par.c
index 974b51041..07e62eff1 100644
--- a/src/spicelib/devices/bsim2/b2par.c
+++ b/src/spicelib/devices/bsim2/b2par.c
@@ -20,7 +20,7 @@ B2param(int param, IFvalue *value, GENinstance *inst, IFvalue *select)
 
     NG_IGNORE(select);
 
-    switch(param) {
+    switch (param) {
         case BSIM2_W:
             here->B2w = value->rValue;
             here->B2wGiven = TRUE;
@@ -73,6 +73,8 @@ B2param(int param, IFvalue *value, GENinstance *inst, IFvalue *select)
             here->B2icVGSGiven = TRUE;
             break;
         case BSIM2_IC:
+            /* FALLTHROUGH added to suppress GCC warning due to
+             * -Wimplicit-fallthrough flag */
             switch(value->v.numValue){
                 case 3:
                     here->B2icVBS = *(value->v.vec.rVec+2);
diff --git a/src/spicelib/devices/bsim3/b3par.c b/src/spicelib/devices/bsim3/b3par.c
index 74599ea1e..ae961b586 100644
--- a/src/spicelib/devices/bsim3/b3par.c
+++ b/src/spicelib/devices/bsim3/b3par.c
@@ -31,8 +31,8 @@ IFvalue *select)
     if (!cp_getvar("scale", CP_REAL, &scale, 0))
         scale = 1;
 
-    switch(param)
-    {   case BSIM3_W:
+    switch (param) {
+        case BSIM3_W:
             here->BSIM3w = value->rValue*scale;
             here->BSIM3wGiven = TRUE;
             break;
@@ -104,7 +104,9 @@ IFvalue *select)
             here->BSIM3mulu0Given = TRUE;
             break;
         case BSIM3_IC:
-            switch(value->v.numValue){
+            /* FALLTHROUGH added to suppress GCC warning due to
+             * -Wimplicit-fallthrough flag */
+            switch (value->v.numValue) {
                 case 3:
                     here->BSIM3icVBS = *(value->v.vec.rVec+2);
                     here->BSIM3icVBSGiven = TRUE;
diff --git a/src/spicelib/devices/bsim3soi_dd/b3soiddpar.c b/src/spicelib/devices/bsim3soi_dd/b3soiddpar.c
index fb2ad5702..a16ca92ca 100644
--- a/src/spicelib/devices/bsim3soi_dd/b3soiddpar.c
+++ b/src/spicelib/devices/bsim3soi_dd/b3soiddpar.c
@@ -23,8 +23,10 @@ B3SOIDDparam(int param, IFvalue *value, GENinstance *inst, IFvalue *select)
 
     NG_IGNORE(select);
 
-    switch(param) 
-    {   case B3SOIDD_W:
+    /* FALLTHROUGH added to suppress GCC warning due to
+     * -Wimplicit-fallthrough flag */
+    switch(param) {
+        case B3SOIDD_W:
             here->B3SOIDDw = value->rValue;
             here->B3SOIDDwGiven = TRUE;
             break;
@@ -104,7 +106,7 @@ B3SOIDDparam(int param, IFvalue *value, GENinstance *inst, IFvalue *select)
             here->B3SOIDDbodySquaresGiven = TRUE;
             break;
         case B3SOIDD_IC:
-            switch(value->v.numValue){
+            switch (value->v.numValue) {
                 case 5:
                     here->B3SOIDDicVPS = *(value->v.vec.rVec+4);
                     here->B3SOIDDicVPSGiven = TRUE;
diff --git a/src/spicelib/devices/bsim3soi_fd/b3soifdpar.c b/src/spicelib/devices/bsim3soi_fd/b3soifdpar.c
index 6fbe77f0c..db2d2b32a 100644
--- a/src/spicelib/devices/bsim3soi_fd/b3soifdpar.c
+++ b/src/spicelib/devices/bsim3soi_fd/b3soifdpar.c
@@ -24,8 +24,8 @@ B3SOIFDparam(int param, IFvalue *value, GENinstance *inst,
 
     NG_IGNORE(select);
 
-    switch(param) 
-    {   case B3SOIFD_W:
+    switch (param) {
+        case B3SOIFD_W:
             here->B3SOIFDw = value->rValue;
             here->B3SOIFDwGiven = TRUE;
             break;
@@ -105,7 +105,9 @@ B3SOIFDparam(int param, IFvalue *value, GENinstance *inst,
             here->B3SOIFDbodySquaresGiven = TRUE;
             break;
         case B3SOIFD_IC:
-            switch(value->v.numValue){
+            /* FALLTHROUGH added to suppress GCC warning due to
+             * -Wimplicit-fallthrough flag */
+            switch (value->v.numValue) {
                 case 5:
                     here->B3SOIFDicVPS = *(value->v.vec.rVec+4);
                     here->B3SOIFDicVPSGiven = TRUE;
diff --git a/src/spicelib/devices/bsim3soi_pd/b3soipdpar.c b/src/spicelib/devices/bsim3soi_pd/b3soipdpar.c
index dafba04cb..624e41009 100644
--- a/src/spicelib/devices/bsim3soi_pd/b3soipdpar.c
+++ b/src/spicelib/devices/bsim3soi_pd/b3soipdpar.c
@@ -25,8 +25,10 @@ B3SOIPDparam(int param, IFvalue *value, GENinstance *inst, IFvalue *select)
 
     NG_IGNORE(select);
 
-    switch(param) 
-    {   case B3SOIPD_W:
+    /* FALLTHROUGH added to suppress GCC warning due to
+     * -Wimplicit-fallthrough flag */
+    switch(param) {
+        case B3SOIPD_W:
             here->B3SOIPDw = value->rValue;
             here->B3SOIPDwGiven = TRUE;
             break;
@@ -148,7 +150,7 @@ B3SOIPDparam(int param, IFvalue *value, GENinstance *inst, IFvalue *select)
 
 
         case B3SOIPD_IC:
-            switch(value->v.numValue){
+            switch (value->v.numValue) {
                 case 5:
                     here->B3SOIPDicVPS = *(value->v.vec.rVec+4);
                     here->B3SOIPDicVPSGiven = TRUE;
diff --git a/src/spicelib/devices/bsim3v0/b3v0par.c b/src/spicelib/devices/bsim3v0/b3v0par.c
index 6e86fcc97..c3d0ac1c3 100644
--- a/src/spicelib/devices/bsim3v0/b3v0par.c
+++ b/src/spicelib/devices/bsim3v0/b3v0par.c
@@ -23,8 +23,8 @@ BSIM3v0param(int param, IFvalue *value, GENinstance *inst, IFvalue *select)
     if (!cp_getvar("scale", CP_REAL, &scale, 0))
         scale = 1;
 
-    switch(param) 
-    {   case BSIM3v0_W:
+    switch (param) {
+        case BSIM3v0_W:
             here->BSIM3v0w = value->rValue*scale;
             here->BSIM3v0wGiven = TRUE;
             break;
@@ -80,7 +80,9 @@ BSIM3v0param(int param, IFvalue *value, GENinstance *inst, IFvalue *select)
             here->BSIM3v0nqsModGiven = TRUE;
             break;
         case BSIM3v0_IC:
-            switch(value->v.numValue){
+            /* FALLTHROUGH added to suppress GCC warning due to
+             * -Wimplicit-fallthrough flag */
+            switch (value->v.numValue) {
                 case 3:
                     here->BSIM3v0icVBS = *(value->v.vec.rVec+2);
                     here->BSIM3v0icVBSGiven = TRUE;
diff --git a/src/spicelib/devices/bsim3v1/b3v1par.c b/src/spicelib/devices/bsim3v1/b3v1par.c
index 440744015..839b604c1 100644
--- a/src/spicelib/devices/bsim3v1/b3v1par.c
+++ b/src/spicelib/devices/bsim3v1/b3v1par.c
@@ -29,8 +29,8 @@ BSIM3v1param(int param, IFvalue *value, GENinstance *inst, IFvalue *select)
     if (!cp_getvar("scale", CP_REAL, &scale, 0))
         scale = 1;
 
-    switch(param) 
-    {   case BSIM3v1_W:
+    switch (param) {
+        case BSIM3v1_W:
             here->BSIM3v1w = value->rValue*scale;
             here->BSIM3v1wGiven = TRUE;
             break;
@@ -86,7 +86,9 @@ BSIM3v1param(int param, IFvalue *value, GENinstance *inst, IFvalue *select)
             here->BSIM3v1nqsModGiven = TRUE;
             break;
         case BSIM3v1_IC:
-            switch(value->v.numValue){
+            /* FALLTHROUGH added to suppress GCC warning due to
+             * -Wimplicit-fallthrough flag */
+            switch (value->v.numValue) {
                 case 3:
                     here->BSIM3v1icVBS = *(value->v.vec.rVec+2);
                     here->BSIM3v1icVBSGiven = TRUE;
diff --git a/src/spicelib/devices/bsim3v32/b3v32par.c b/src/spicelib/devices/bsim3v32/b3v32par.c
index 485ab3642..ff5d7fa82 100644
--- a/src/spicelib/devices/bsim3v32/b3v32par.c
+++ b/src/spicelib/devices/bsim3v32/b3v32par.c
@@ -28,8 +28,8 @@ BSIM3v32param (int param, IFvalue *value, GENinstance *inst, IFvalue *select)
     if (!cp_getvar("scale", CP_REAL, &scale, 0))
         scale = 1;
 
-    switch(param)
-    {   case BSIM3v32_W:
+    switch (param) {
+        case BSIM3v32_W:
             here->BSIM3v32w = value->rValue*scale;
             here->BSIM3v32wGiven = TRUE;
             break;
@@ -97,7 +97,9 @@ BSIM3v32param (int param, IFvalue *value, GENinstance *inst, IFvalue *select)
             here->BSIM3v32mulu0Given = TRUE;
             break;
         case BSIM3v32_IC:
-            switch(value->v.numValue){
+            /* FALLTHROUGH added to suppress GCC warning due to
+             * -Wimplicit-fallthrough flag */
+            switch (value->v.numValue) {
                 case 3:
                     here->BSIM3v32icVBS = *(value->v.vec.rVec+2);
                     here->BSIM3v32icVBSGiven = TRUE;
diff --git a/src/spicelib/devices/bsim4/b4par.c b/src/spicelib/devices/bsim4/b4par.c
index fa5654b4a..b57337d23 100644
--- a/src/spicelib/devices/bsim4/b4par.c
+++ b/src/spicelib/devices/bsim4/b4par.c
@@ -81,8 +81,8 @@ IFvalue *select)
     if (!cp_getvar("scale", CP_REAL, &scale, 0))
         scale = 1;
 
-    switch(param) 
-    {   case BSIM4_W:
+    switch (param) {
+        case BSIM4_W:
             here->BSIM4w = value->rValue * scale;
             here->BSIM4wGiven = TRUE;
             break;
@@ -230,8 +230,10 @@ IFvalue *select)
             here->BSIM4icVBSGiven = TRUE;
             break;
         case BSIM4_IC:
-            switch(value->v.numValue)
-            {   case 3:
+            /* FALLTHROUGH added to suppress GCC warning due to
+             * -Wimplicit-fallthrough flag */
+            switch (value->v.numValue) {
+                case 3:
                     here->BSIM4icVBS = *(value->v.vec.rVec+2);
                     here->BSIM4icVBSGiven = TRUE;
                     /* FALLTHROUGH */
diff --git a/src/spicelib/devices/bsim4v5/b4v5par.c b/src/spicelib/devices/bsim4v5/b4v5par.c
index 2a49a0ad8..e62b7f660 100644
--- a/src/spicelib/devices/bsim4v5/b4v5par.c
+++ b/src/spicelib/devices/bsim4v5/b4v5par.c
@@ -35,8 +35,8 @@ IFvalue *select)
     if (!cp_getvar("scale", CP_REAL, &scale, 0))
         scale = 1;
 
-    switch(param) 
-    {   case BSIM4v5_W:
+    switch (param) {
+        case BSIM4v5_W:
             here->BSIM4v5w = value->rValue*scale;
             here->BSIM4v5wGiven = TRUE;
             break;
@@ -180,8 +180,10 @@ IFvalue *select)
             here->BSIM4v5icVBSGiven = TRUE;
             break;
         case BSIM4v5_IC:
-            switch(value->v.numValue)
-            {   case 3:
+            /* FALLTHROUGH added to suppress GCC warning due to
+             * -Wimplicit-fallthrough flag */
+            switch (value->v.numValue) {
+                case 3:
                     here->BSIM4v5icVBS = *(value->v.vec.rVec+2);
                     here->BSIM4v5icVBSGiven = TRUE;
                     /* FALLTHROUGH */
diff --git a/src/spicelib/devices/bsim4v6/b4v6par.c b/src/spicelib/devices/bsim4v6/b4v6par.c
index 2debab48c..87e0bc09e 100644
--- a/src/spicelib/devices/bsim4v6/b4v6par.c
+++ b/src/spicelib/devices/bsim4v6/b4v6par.c
@@ -37,8 +37,8 @@ IFvalue *select)
     if (!cp_getvar("scale", CP_REAL, &scale, 0))
         scale = 1;
 
-    switch(param) 
-    {   case BSIM4v6_W:
+    switch (param) {
+        case BSIM4v6_W:
             here->BSIM4v6w = value->rValue*scale;
             here->BSIM4v6wGiven = TRUE;
             break;
@@ -182,8 +182,10 @@ IFvalue *select)
             here->BSIM4v6icVBSGiven = TRUE;
             break;
         case BSIM4v6_IC:
-            switch(value->v.numValue)
-            {   case 3:
+    /* FALLTHROUGH added to suppress GCC warning due to
+     * -Wimplicit-fallthrough flag */
+            switch (value->v.numValue) {
+                case 3:
                     here->BSIM4v6icVBS = *(value->v.vec.rVec+2);
                     here->BSIM4v6icVBSGiven = TRUE;
                     /* FALLTHROUGH */
diff --git a/src/spicelib/devices/bsim4v7/b4v7par.c b/src/spicelib/devices/bsim4v7/b4v7par.c
index 776d494bc..5e42f1596 100644
--- a/src/spicelib/devices/bsim4v7/b4v7par.c
+++ b/src/spicelib/devices/bsim4v7/b4v7par.c
@@ -37,8 +37,8 @@ IFvalue *select)
     if (!cp_getvar("scale", CP_REAL, &scale, 0))
         scale = 1;
 
-    switch(param) 
-    {   case BSIM4v7_W:
+    switch (param) {
+        case BSIM4v7_W:
             here->BSIM4v7w = value->rValue * scale;
             here->BSIM4v7wGiven = TRUE;
             break;
@@ -186,8 +186,10 @@ IFvalue *select)
             here->BSIM4v7icVBSGiven = TRUE;
             break;
         case BSIM4v7_IC:
-            switch(value->v.numValue)
-            {   case 3:
+            /* FALLTHROUGH added to suppress GCC warning due to
+             * -Wimplicit-fallthrough flag */
+            switch (value->v.numValue) {
+                case 3:
                     here->BSIM4v7icVBS = *(value->v.vec.rVec+2);
                     here->BSIM4v7icVBSGiven = TRUE;
                     /* FALLTHROUGH */